Banner SureCross DX80 Wireless Networks - Manual (Page 104)

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Units Conversion
Units Defined
The units parameter defines the range and/or type of data value associated with an input or output.
Selecting Units from within any configuration tool changes the units definition of several parameters, including threshold, hysteresis, and delta.
For example, if the units are 0-20 mA, the threshold, hysteresis, and delta values are entered as milliampere values. Selecting Temp C changes
the threshold, hysteresis, and delta units to degrees Celsius.
Signed values range from −32768 to +32767 and allow for the measurement of negative values. Signed values are typically used for
measuring temperatures. Signed values are stored as two’s complement values.
Unsigned values range from 0 to 65535 and are used to measure values that do not go below zero, such as 4 to 20 mA, distance, or a counter.
Input Units
0. Raw. Displays the raw A/D conversion data with data ranges from 0 to 65535. This units type is typically used only for factory calibration.
1. 4 to 20 mA. Analog unit. Modbus register contents are scaled such that 0 represents 4 mA and 65535 represents 20 mA.
2. 0 to 20 mA. Default analog input unit. Modbus register contents are scaled such that 0 represents 0 mA and 65535 represents 20 mA.
3. Discrete (On/Off). Default discrete input unit.
4. 0 to 10V (Volts). Analog input using 0 to 10V instead of current. Modbus register contents are scaled such that 0 represents 0V and 65535
represents 10V.
6. Temp C. Celsius, high resolution. Analog input for temperature devices such as thermocouples, RTD, and thermistors. In high resolution
mode, temperature = (Modbus register value) ÷ 20.
7. Temp F. Fahrenheit, high resolution. Analog input for temperature devices such as thermocouples, RTD, and thermistors. In high resolution
mode, temperature = (Modbus register value) ÷ 20.
8. Temp C LowRes. Celsuis, low resolution. To measure a greater temperature range, use the low resolution unit. In low resolution mode,
temperature = (Modbus register value) ÷ 2.
9. Temp F Low Res. Fahrenheit, low resolution. To measure a greater temperature range, use the low resolution unit. In low resolution mode,
temperature = (Modbus register value) ÷ 2.
10. Asynchronous Counter, 32-bit. The 32-bit counter value records counts up to 4.29 billion.
11. Asynchronous Counter, 16-bit. The 16-bit counter value records counts up to 65535.
Output Units
0. Raw. Displays the raw A/D conversion data with data ranges from 0 to 65535. This units type is typically used only for factory calibration.
1. 4 to 20 mA. Analog unit. Modbus register contents are scaled such that 0 represents 4 mA and 65535 represents 20 mA.
2. 0 to 20 mA. Default analog input unit. Modbus register contents are scaled such that 0 represents 0 mA and 65535 represents 20 mA.
3. Discrete (On/Off). Default discrete input unit.
4. 0 to 10V (Volts). Analog unit using 0 to 10V instead of current. Modbus register contents are scaled such that 0 represents 0V and 65535
represents 10V.
5. Signed Analog, 0 to 10V. For a signed value, such as temperature, that is to be converted to a voltage out value. Use null to set the start
point and span to define the range. The null value is the starting temperature to be associated with 0V. The span is the entire temperature range
that is to be associated with 0 to 10V.
6. Signed Analog, 0 to 20 mA. For a signed value, such as temperature, that is to be converted to a mA out value. Use null to set the start
point and span to define the range. The null value is the starting temperature to be associated with 0 mA. The span is the entire temperature
range that is to be associated with 0 to 20 mA.
7. Unsigned Analog, 0 to 20 mA. For unsigned values, such as a counter, that is to be converted to a mA out value. Use the null to set the
start point and span to define the range. The null value is the distance to be associated with 0 mA. The span is the entire distance range that is
to be associated with 0 to 20 mA.
8. Signed Analog, 4 to 20 mA (A). In older models, this units type is for degree Celsius conversions only. Use null to set the start point and